Not equipped with a swingress; swingressless.
Hubert's photo reveals a clever archaic invention from bygone times, now virtually forgotten. Despite its historical obsolescence, the principle per se works infallibly to the present day: All beswingressed keys will self-readjust differently than nonswingressed. Without the possibility of failure or malfunction, as long as gravity exists. So what were swingresses used for? They enabled the owner to finger-feel their wobble keys reliably even in the dark or blindfolded. The swingress also facilitates visual inspection - a key hanging slantwise amongst others can be easily spotted at a glance. (Context: Dr∙ Barton analyses a photograph of the missing part of a key discovered in the wood of an old linden tree. Source: J∙ Okram - The Mystery of the Rammed Key.)